DP Chemistry (first assessment 2025)
Question 22M.1A.HL.TZ2.12
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.1A.HL.TZ2.12 |
| Level | HL | Paper | 1A | Time zone | TZ2 |
| Command term | Determine | Question number | 12 | Adapted from | N/A |
12.
[Maximum mark: 1]
22M.1A.HL.TZ2.12
What is the molecular geometry of SF4?
A. Tetrahedral
B. Trigonal bipyramidal
C. See-saw
D. Square planar
[1]
Markscheme
C
Examiners report
54% of the candidates deduced the molecular geometry of SF4. The distractors were chosen with equal frequency by the rest of the candidates. This question discriminated well between high-scoring and low-scoring candidates.
Syllabus sections
Structure 2. Models of bonding and structure » Structure 2.2—The covalent model » Structure 2.2.13—Some atoms can form molecules in which they have an expanded octet of electrons. Visually represent Lewis formulas for species with five and six electron domains around the central atom. Deduce the electron domain geometry and the molecular geometry for these species using the VSEPR model.